Newly created ultra-hard material rivals diamond

Scientists have solved a decades-long puzzle and unveiled a near unbreakable substance that could rival diamond as the hardest material on Earth. The research is published in the journal Advanced Materials.

Chemists tackle formation of natural aerosols

City dwellers have long had to contend with smog—that ugly haze that hangs over urban areas—as a result of emissions-producing human activities as diverse as manufacturing, mowing the lawn, driving cars, and even cooking.

page 1 from 31